add random candidato

OpenCand.API/Controllers/CandidatoController.cs

@@ -30,6 +30,15 @@ namespace OpenCand.API.Controllers
             return await openCandService.SearchCandidatosAsync(q);
         }
 
+        [HttpGet("random")]
+        public async Task<object> GetRandomCandidatoId()
+        {
+            return new
+            {
+                idCandidato = await openCandService.GetRandomCandidato()
+            };
+        }
+
         [HttpGet("{id}")]
         public async Task<Candidato> GetCandidatoById([FromRoute] Guid id)
         {

OpenCand.API/Repository/CandidatoRepository.cs

@@ -101,5 +101,16 @@ namespace OpenCand.Repository
                 return (await connection.QueryAsync<CandidatoExt>(query, new { idcandidato })).AsList();
             }
         }
+
+        public async Task<Guid?> GetRandomCandidatoIdAsync()
+        {
+            using var connection = new NpgsqlConnection(ConnectionString);
+            return await connection.QueryFirstOrDefaultAsync<Guid?>(@"
+                SELECT idcandidato
+                FROM candidato
+                ORDER BY RANDOM()
+                LIMIT 1;
+            ");
+        }
     }
 }

OpenCand.API/Services/OpenCandService.cs

@@ -55,6 +55,11 @@ namespace OpenCand.API.Services
             };
         }
 
+        public async Task<Guid?> GetRandomCandidato()
+        {
+            return await candidatoRepository.GetRandomCandidatoIdAsync();
+        }
+
         public async Task<Candidato> GetCandidatoAsync(Guid idcandidato)
         {
             var result = await candidatoRepository.GetCandidatoAsync(idcandidato);